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Forage Quality and Animal Performance as Influenced by Quackgrass (Agropyron repens) Control in Alfalfa (Medicago sativa) with Pronamide

Published online by Cambridge University Press:  12 June 2017

T. E. Dutt ,
R. G. Harvey ,
R. S. Fawcett ,
N. A. Jorgensen ,
H. J. Larsen  and
D. A. Schlough
T. E. Dutt
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
R. G. Harvey
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
R. S. Fawcett
Affiliation:
Dep. Bot. and Plant Path., Iowa St. Univ., Ames, IA 50010
N. A. Jorgensen
Affiliation:
Dep. Dairy Sci., Univ. of Wisconsin, Madison, WI 53706
H. J. Larsen
Affiliation:
Dep. Dairy Sci., Univ. of Wisconsin, Madison, WI 53706
D. A. Schlough
Affiliation:
Ashland Exp. Farm, Ashland, WI 54806
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Abstract

Fall applications of pronamide [3,5-dichloro(N-1,1-dimethyl-2-propynyl)benzamide] control or suppress quackgrass [Agropyron repens (L.) Beauv.] in established alfalfa (Medicago sativa L.). Studies were initiated to evaluate benefits of pronamide usage in areas where quackgrass is a problem. Alfalfa swards severely infested with quackgrass were treated with pronamide. Forage quality of first cutting alfalfa was significantly improved with pronamide usage, but second and third cutting forage quality was not greatly affected. First cutting hay from pronamide-treated and untreated areas was fed to goats and dairy cows in feeding trials. Animal intake of total forage dry matter, digestible dry matter, and digestible crude protein was increased with pronamide usage. A reduction in need for supplemental protein, an increase in efficiency in dry matter conversion into milk, and a 20% increase in milk production resulted from controlling quackgrass in alfalfa with pronamide.

Keywords

Cattlegoatsintakeproteindigestibility
Type
Research Article
Information
Weed Science , Volume 27 , Issue 1 , January 1979 , pp. 127 - 132
Copyright
Copyright © 1979 by the Weed Science Society of America 

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